{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-qt7on8ls","versions":[{"created_at":"2026-06-25T19:29:35Z","element_count":69,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"49bdb9bacc65fb6800fc0e236c330ece9f85070ca1d25643df3fcc35d083f5d9","version":3},{"created_at":"2026-06-25T19:23:36Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fb0ce91f7af98185733984666b674596c353762fd1f618d501b095d49f16d9b5","version":2},{"created_at":"2026-06-25T19:23:36Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}